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Image 01: 1 Clean the surface, apply a primer and wait for 4 hours to dry;
Image 02: 2 Insert the boundary cord along the entire length of the gap with the help of a spatula;
Image 03: 3 Apply a coat of joint treatment compound to the recessed area of the slab;
Image 04: 4 On the dough, apply the 51 tape with a spatula, keeping it taut;
Image 05: 5 Apply a new coat of grout compound over the 51mm tape;
Image 06: 6 With a spatula, apply 102mm tape over the compound, keeping it stretched out;
Image 07: 7 Apply another coat of joint care compound over the 102mm tape;
Image 08: After 24 hours, finish the joint treatment with finishing compound.